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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
A closed cycle gas turbine gives ________ efficiency as compared to an open cycle gas turbine.

Lower
Same
None of these
Higher

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Compressors, Gas Turbines and Jet Engines
The net work input required for compressor with increase in clearance volume

Decreases
Remains same
Increases
Increases/decreases depending on compressor capacity

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Compressors, Gas Turbines and Jet Engines
Surging is the phenomenon of

Air stream not able to follow the blade contour
Air stream blocking the passage
Unsteady, periodic and reversed flow
Motion of air at sonic velocity

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Compressors, Gas Turbines and Jet Engines
High air-fuel ratio is used in gas turbines

To save fuel
To reduce the exit temperature
To increase the efficiency
To increase the output

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Compressors, Gas Turbines and Jet Engines
Gas turbine works on

Brayton or Atkinson cycle
Rankine cycle
Ericsson cycle
Carnot cycle

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Compressors, Gas Turbines and Jet Engines
The ratio of isentropic work to Euler’s work is known as

Isentropic efficiency
Pressure coefficient
Compressor efficiency
Euler

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